The U.S. Anti-Doping Agency wrote a letter to members of Congress appealing for legislators to soften the federal stance on the recreational use of marijuana.
The step comes after USADA suspended American sprinter Sha'Carri Richardson for 30 days after she tested positive for THC. As a result, Richardson won't represent Team USA at the Summer Olympics in Tokyo.
USADA said in Friday's letter it can't act unilaterally to remove marijuana as a banned substance.
"Most governments in the world have been very reluctant to take marijuana off the prohibited list for public health reasons,” the letter said, per the Associated Press' Eddie Pells.